American Board of Ophthalmology (ABO) Practice Exam 2025 – The Complete All-in-One Guide to Exam Success

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Which condition involves an overgrowth of conjunctival tissue?

Chalazion

Pinguecula

Pterygium

The condition that involves an overgrowth of conjunctival tissue is pterygium. This growth originates from the conjunctiva and extends onto the cornea, typically appearing as a triangular-shaped fibrovascular tissue. Pterygium is often associated with prolonged exposure to UV light, wind, and dust, which can cause irritation and inflammation of the conjunctiva, leading to this abnormal growth.

In contrast to other conditions mentioned, a chalazion is a blocked oil gland in the eyelid, conjunctivitis refers to inflammation of the conjunctiva often due to infection or irritants, and a pinguecula is a yellowish, raised growth on the conjunctiva, usually on the side closest to the nose, but it does not typically extend onto the cornea as pterygium does. Thus, pterygium is specifically characterized by the overgrowth of conjunctival tissue, making it the correct response.

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Conjunctivitis

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